Improvement in spark-arresters



]. HUGHES.,

I Spark-Arrgsters. No. 144,275. Patented Nov. 4, 1873.

, Inventor Per Ano%

UNITED STATES PATENT Orrron.

Jiuun's HUGHES, or sennnron, PENNSYLVANIA:

IMPROVEMENT IN SPA-RK-ARRESTERS.

Specification forming part of Letters Patent No. 144,275, dated November4, 1873,- application filed October 11, 1873.

To all whom it may concern: 7

Be it known that I, JAMES HUGHES, of Scranton, in the county of Luzerneand State of Pennsylvania, have invented a new and useful Improvement inSpark-Arresters, of which the following is a specification:

Figure 1 is a detail vertical section of my improved device. Fig. 2 is aplan view of the rings, and Fig. 3 is a plan view of one of the plates.

My invention has for its object to furnish an improved spark-arresterfor attachment to the smoke-stack of locomotive-engines, which shall beso constructed as not to obstruct the draft, while preventing thepassage of the sparks, and preventing the exhaust from cutting thewire-netting. The invention consists in the combination of the twoequal-sized perforated rings and the two equalsized perforated circularplates with each other adjustably, as hereinafter fully described.

A are two ring-plates, of exactly the same form and size, and which areperforated with numerous holes, as seen in Fig. 2, which holes should beso arranged that the holes of one ring may be directly over the spacesbetween the holes in the other ring, so that the draft cannot passdirectly through the holes to the netting. B are two circular plates, ofthe same form and size, and of about the size of, or a little largerthan, the center openings of the rings A. The plates B are perforatedwith numerous holes, which should be so arranged that the holes of oneplate may be opposite the spaces between the holes of the other plate,so that the draft cannot pass directly through to the netting. One ofthe circular plates B is rigidly connected with one of the ring-plates Aby rigid arms 0, as shown in Fig. 1', so that the said circularplate maybe supported from the said ring-plate. To the center of the circularplate 13 is attached a standard, the upper part of which has ascrew-thread out upon it, and passes up through a hole in the center ofthe other circular plate 13, which is secured adjustably to the saidstandard by two nuts placed, the one above the other, below the saidplate 13., In the ring-plates A are formed three or more holes, toreceive the rods by which the device is supported, and to which saidrings are secured by nuts screwed upon the said rods above and below thesaid rings.

By this construction the rings and plates may be conveniently adjustedat any desired distance apart.

This construction allows the four plates A A 13 B to be differentlyarranged with respect to each otheras, for instance, the upper circularplate may be placed between the rings A; or the lower ring and lowercircular plate may be inverted, bringing the lower circular platebetween the rings; or the upper circular plate 13 may be placed belowthe lower circular plate B; or the lower circular plate and the lowerring may be inverted, and the upper ring placed below the otherring-thus enabling the rings and plates to be adjusted as maybe bestadapted to the particular smoke-stack to which the device is to beattached.

Having thus described my invention, I claim asnew and desire to secureby Letters Pat ent The combination of the two equal-sized perforatedrings A and the two equal-sized perforated circular plates B with eachotheradjustably, substantially as herein shown and de- EDWARD BALDWIN,PETER B. BACKUS.

